For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningEngine Air Cleaner/Filter
When to Inspect the Engine Air Cleaner/Filter
Inspect the air cleaner/filter at the scheduled maintenance intervals and replace
it at the first oil change after each 80 000 km (50,000 mi) interval. If you are
driving in dusty/dirty conditions, inspect the filter at each engine oil change.
How ...
Ignition Positions (Keyless Access)
The vehicle has an electronic keyless ignition with pushbutton start.
Pressing the button cycles it through three modes, ACC/ACCESSORY, ON/RUN/START,
and Stopping the Engine/OFF.
The transmitter must be in the vehicle for the system to operate.
If the pushbutton start is not working, the vehi ...
Rear Compartment Lid Replacement
Preliminary Procedure
Remove the rear compartment lid inner panel trim. Refer to Rear Compartment
Lid Inner Panel Trim Replacement.
Rear Compartment Lid Hinge Bolt (Qty: 4)
Caution: Refer to Fastener Caution in the Preface section.
Tighten
9 N·m (80 lb ft)
Rear Compartment Lid
...